diff --git a/api/test-current.txt b/api/test-current.txt
index 785463a92c454..a0490e2b55b3c 100644
--- a/api/test-current.txt
+++ b/api/test-current.txt
@@ -1793,6 +1793,7 @@ package android.telephony {
     method @NonNull public java.util.List<android.telephony.data.ApnSetting> getDevicePolicyOverrideApns(@NonNull android.content.Context);
     method @RequiresPermission(android.Manifest.permission.READ_PHONE_STATE) public String getLine1AlphaTag();
     method public android.util.Pair<java.lang.Integer,java.lang.Integer> getRadioHalVersion();
+    method @RequiresPermission(android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE) public long getSupportedRadioAccessFamily();
     method public boolean modifyDevicePolicyOverrideApn(@NonNull android.content.Context, int, @NonNull android.telephony.data.ApnSetting);
     method @RequiresPermission(android.Manifest.permission.MODIFY_PHONE_STATE) public void refreshUiccProfile();
     method @Deprecated public void setCarrierTestOverride(String, String, String, String, String, String, String);
diff --git a/telephony/java/android/telephony/TelephonyManager.java b/telephony/java/android/telephony/TelephonyManager.java
index c982f490e0fd7..425addc70daea 100644
--- a/telephony/java/android/telephony/TelephonyManager.java
+++ b/telephony/java/android/telephony/TelephonyManager.java
@@ -12015,12 +12015,13 @@ public class TelephonyManager {
      * @hide
      */
     @SystemApi
+    @TestApi
     @RequiresPermission(android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE)
     public @NetworkTypeBitMask long getSupportedRadioAccessFamily() {
         try {
             ITelephony telephony = getITelephony();
             if (telephony != null) {
-                return (long) telephony.getRadioAccessFamily(getSlotIndex(), getOpPackageName());
+                return telephony.getRadioAccessFamily(getSlotIndex(), getOpPackageName());
             } else {
                 // This can happen when the ITelephony interface is not up yet.
                 return NETWORK_TYPE_BITMASK_UNKNOWN;